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| US4136936 | 18 Mar 1977 | 30 Jan 1979 | | Apparatus for editing motion picture and sound film |
| US4219259 | 11 Dec 1978 | 26 Aug 1980 | | Editing machine |
| US4815013 | 30 Jul 1987 | 21 Mar 1989 | Universal Recording Corporation | Variable speed film transport interlock system and method using same |
| US4933881 | 13 Jan 1989 | 12 Jun 1990 | Universal Recording Corporation | Variable speed film transport interlock system |
